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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">expand_gray_ref</span><span data-if="c" style="display:none;">expand_gray_ref</span><span data-if="cpp" style="display:none;">ExpandGrayRef</span><span data-if="dotnet" style="display:none;">ExpandGrayRef</span><span data-if="python" style="display:none;">expand_gray_ref</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">expand_gray_ref</span><span data-if="c" style="display:none;">expand_gray_ref</span><span data-if="cpp" style="display:none;">ExpandGrayRef</span><span data-if="dotnet" style="display:none;">ExpandGrayRef</span><span data-if="python" style="display:none;">expand_gray_ref</span></code> — Fill gaps between regions (depending on gray value or color) or split
overlapping regions.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>expand_gray_ref</b>(<a href="#Regions"><i>区域</i></a>, <a href="#Image"><i>Image</i></a>, <a href="#ForbiddenArea"><i>ForbiddenArea</i></a> : <a href="#RegionExpand"><i>RegionExpand</i></a> : <a href="#Iterations"><i>Iterations</i></a>, <a href="#Mode"><i>Mode</i></a>, <a href="#RefGray"><i>RefGray</i></a>, <a href="#Threshold"><i>Threshold</i></a> : )</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>expand_gray_ref</b>(const Hobject <a href="#Regions"><i>区域</i></a>, const Hobject <a href="#Image"><i>Image</i></a>, const Hobject <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, Hobject* <a href="#RegionExpand"><i>RegionExpand</i></a>, const char* <a href="#Iterations"><i>Iterations</i></a>, const char* <a href="#Mode"><i>Mode</i></a>, const Hlong <a href="#RefGray"><i>RefGray</i></a>, const Hlong <a href="#Threshold"><i>Threshold</i></a>)</code></p>
<p>
<code>Herror <b>T_expand_gray_ref</b>(const Hobject <a href="#Regions"><i>区域</i></a>, const Hobject <a href="#Image"><i>Image</i></a>, const Hobject <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, Hobject* <a href="#RegionExpand"><i>RegionExpand</i></a>, const Htuple <a href="#Iterations"><i>Iterations</i></a>, const Htuple <a href="#Mode"><i>Mode</i></a>, const Htuple <a href="#RefGray"><i>RefGray</i></a>, const Htuple <a href="#Threshold"><i>Threshold</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>ExpandGrayRef</b>(const HObject&amp; <a href="#Regions"><i>区域</i></a>, const HObject&amp; <a href="#Image"><i>Image</i></a>, const HObject&amp; <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, HObject* <a href="#RegionExpand"><i>RegionExpand</i></a>, const HTuple&amp; <a href="#Iterations"><i>Iterations</i></a>, const HTuple&amp; <a href="#Mode"><i>Mode</i></a>, const HTuple&amp; <a href="#RefGray"><i>RefGray</i></a>, const HTuple&amp; <a href="#Threshold"><i>Threshold</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HImage.html">HImage</a>::<b>ExpandGrayRef</b>(const HRegion&amp; <a href="#Regions"><i>区域</i></a>, const HRegion&amp; <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, const HTuple&amp; <a href="#Iterations"><i>Iterations</i></a>, const HString&amp; <a href="#Mode"><i>Mode</i></a>, const HTuple&amp; <a href="#RefGray"><i>RefGray</i></a>, const HTuple&amp; <a href="#Threshold"><i>Threshold</i></a>) const</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HImage.html">HImage</a>::<b>ExpandGrayRef</b>(const HRegion&amp; <a href="#Regions"><i>区域</i></a>, const HRegion&amp; <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, const HString&amp; <a href="#Iterations"><i>Iterations</i></a>, const HString&amp; <a href="#Mode"><i>Mode</i></a>, Hlong <a href="#RefGray"><i>RefGray</i></a>, Hlong <a href="#Threshold"><i>Threshold</i></a>) const</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HImage.html">HImage</a>::<b>ExpandGrayRef</b>(const HRegion&amp; <a href="#Regions"><i>区域</i></a>, const HRegion&amp; <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, const char* <a href="#Iterations"><i>Iterations</i></a>, const char* <a href="#Mode"><i>Mode</i></a>, Hlong <a href="#RefGray"><i>RefGray</i></a>, Hlong <a href="#Threshold"><i>Threshold</i></a>) const</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HImage.html">HImage</a>::<b>ExpandGrayRef</b>(const HRegion&amp; <a href="#Regions"><i>区域</i></a>, const HRegion&amp; <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, const wchar_t* <a href="#Iterations"><i>Iterations</i></a>, const wchar_t* <a href="#Mode"><i>Mode</i></a>, Hlong <a href="#RefGray"><i>RefGray</i></a>, Hlong <a href="#Threshold"><i>Threshold</i></a>) const  <span class="signnote">
            (
            Windows only)
          </span></code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>::<b>ExpandGrayRef</b>(const HImage&amp; <a href="#Image"><i>Image</i></a>, const HRegion&amp; <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, const HTuple&amp; <a href="#Iterations"><i>Iterations</i></a>, const HString&amp; <a href="#Mode"><i>Mode</i></a>, const HTuple&amp; <a href="#RefGray"><i>RefGray</i></a>, const HTuple&amp; <a href="#Threshold"><i>Threshold</i></a>) const</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>::<b>ExpandGrayRef</b>(const HImage&amp; <a href="#Image"><i>Image</i></a>, const HRegion&amp; <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, const HString&amp; <a href="#Iterations"><i>Iterations</i></a>, const HString&amp; <a href="#Mode"><i>Mode</i></a>, Hlong <a href="#RefGray"><i>RefGray</i></a>, Hlong <a href="#Threshold"><i>Threshold</i></a>) const</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>::<b>ExpandGrayRef</b>(const HImage&amp; <a href="#Image"><i>Image</i></a>, const HRegion&amp; <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, const char* <a href="#Iterations"><i>Iterations</i></a>, const char* <a href="#Mode"><i>Mode</i></a>, Hlong <a href="#RefGray"><i>RefGray</i></a>, Hlong <a href="#Threshold"><i>Threshold</i></a>) const</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>::<b>ExpandGrayRef</b>(const HImage&amp; <a href="#Image"><i>Image</i></a>, const HRegion&amp; <a href="#ForbiddenArea"><i>ForbiddenArea</i></a>, const wchar_t* <a href="#Iterations"><i>Iterations</i></a>, const wchar_t* <a href="#Mode"><i>Mode</i></a>, Hlong <a href="#RefGray"><i>RefGray</i></a>, Hlong <a href="#Threshold"><i>Threshold</i></a>) const  <span class="signnote">
            (
            Windows only)
          </span></code></p>
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<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>ExpandGrayRef</b>(<a href="HObject.html">HObject</a> <a href="#Regions"><i>区域</i></a>, <a href="HObject.html">HObject</a> <a href="#Image"><i>image</i></a>, <a href="HObject.html">HObject</a> <a href="#ForbiddenArea"><i>forbiddenArea</i></a>, out <a href="HObject.html">HObject</a> <a href="#RegionExpand"><i>regionExpand</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Iterations"><i>iterations</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Mode"><i>mode</i></a>, <a href="HTuple.html">HTuple</a> <a href="#RefGray"><i>refGray</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Threshold"><i>threshold</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HImage.html">HImage</a>.<b>ExpandGrayRef</b>(<a href="HRegion.html">HRegion</a> <a href="#Regions"><i>区域</i></a>, <a href="HRegion.html">HRegion</a> <a href="#ForbiddenArea"><i>forbiddenArea</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Iterations"><i>iterations</i></a>, string <a href="#Mode"><i>mode</i></a>, <a href="HTuple.html">HTuple</a> <a href="#RefGray"><i>refGray</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Threshold"><i>threshold</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HImage.html">HImage</a>.<b>ExpandGrayRef</b>(<a href="HRegion.html">HRegion</a> <a href="#Regions"><i>区域</i></a>, <a href="HRegion.html">HRegion</a> <a href="#ForbiddenArea"><i>forbiddenArea</i></a>, string <a href="#Iterations"><i>iterations</i></a>, string <a href="#Mode"><i>mode</i></a>, int <a href="#RefGray"><i>refGray</i></a>, int <a href="#Threshold"><i>threshold</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>.<b>ExpandGrayRef</b>(<a href="HImage.html">HImage</a> <a href="#Image"><i>image</i></a>, <a href="HRegion.html">HRegion</a> <a href="#ForbiddenArea"><i>forbiddenArea</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Iterations"><i>iterations</i></a>, string <a href="#Mode"><i>mode</i></a>, <a href="HTuple.html">HTuple</a> <a href="#RefGray"><i>refGray</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Threshold"><i>threshold</i></a>)</code></p>
<p>
<code><a href="HRegion.html">HRegion</a> <a href="HRegion.html">HRegion</a>.<b>ExpandGrayRef</b>(<a href="HImage.html">HImage</a> <a href="#Image"><i>image</i></a>, <a href="HRegion.html">HRegion</a> <a href="#ForbiddenArea"><i>forbiddenArea</i></a>, string <a href="#Iterations"><i>iterations</i></a>, string <a href="#Mode"><i>mode</i></a>, int <a href="#RefGray"><i>refGray</i></a>, int <a href="#Threshold"><i>threshold</i></a>)</code></p>
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<div data-if="python" style="display:none;">
<p>
<code>def <b>expand_gray_ref</b>(<a href="#Regions"><i>区域</i></a>: HObject, <a href="#Image"><i>image</i></a>: HObject, <a href="#ForbiddenArea"><i>forbidden_area</i></a>: HObject, <a href="#Iterations"><i>iterations</i></a>: Union[int, str], <a href="#Mode"><i>mode</i></a>: str, <a href="#RefGray"><i>ref_gray</i></a>: MaybeSequence[int], <a href="#Threshold"><i>threshold</i></a>: MaybeSequence[int]) -&gt; HObject</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">expand_gray_ref</span><span data-if="c" style="display:none">expand_gray_ref</span><span data-if="cpp" style="display:none">ExpandGrayRef</span><span data-if="com" style="display:none">ExpandGrayRef</span><span data-if="dotnet" style="display:none">ExpandGrayRef</span><span data-if="python" style="display:none">expand_gray_ref</span></code> closes gaps between the input regions,
which resulted from the suppression of small regions in a
segmentation operator, (mode <i><span data-if="hdevelop" style="display:inline">'image'</span><span data-if="c" style="display:none">"image"</span><span data-if="cpp" style="display:none">"image"</span><span data-if="com" style="display:none">"image"</span><span data-if="dotnet" style="display:none">"image"</span><span data-if="python" style="display:none">"image"</span></i>), for example, or
separates overlapping regions <i><span data-if="hdevelop" style="display:inline">'region'</span><span data-if="c" style="display:none">"region"</span><span data-if="cpp" style="display:none">"region"</span><span data-if="com" style="display:none">"region"</span><span data-if="dotnet" style="display:none">"region"</span><span data-if="python" style="display:none">"region"</span></i>).  Both uses result
from the expansion of regions.  该算子 works by adding a one
pixel wide “strip” to a region, in which the gray values or color
are different from a reference gray value or color by at most
<a href="#Threshold"><i><code><span data-if="hdevelop" style="display:inline">Threshold</span><span data-if="c" style="display:none">Threshold</span><span data-if="cpp" style="display:none">Threshold</span><span data-if="com" style="display:none">Threshold</span><span data-if="dotnet" style="display:none">threshold</span><span data-if="python" style="display:none">threshold</span></code></i></a> (in each channel).  For images of type
<i><span data-if="hdevelop" style="display:inline">'cyclic'</span><span data-if="c" style="display:none">"cyclic"</span><span data-if="cpp" style="display:none">"cyclic"</span><span data-if="com" style="display:none">"cyclic"</span><span data-if="dotnet" style="display:none">"cyclic"</span><span data-if="python" style="display:none">"cyclic"</span></i> (e.g., direction images), also points with a gray
value difference of at least 255 - <a href="#Threshold"><i><code><span data-if="hdevelop" style="display:inline">Threshold</span><span data-if="c" style="display:none">Threshold</span><span data-if="cpp" style="display:none">Threshold</span><span data-if="com" style="display:none">Threshold</span><span data-if="dotnet" style="display:none">threshold</span><span data-if="python" style="display:none">threshold</span></code></i></a> are added
to the output region.
</p>
<p>The expansion takes place only in regions, which are designated as
not “forbidden” (parameter <a href="#ForbiddenArea"><i><code><span data-if="hdevelop" style="display:inline">ForbiddenArea</span><span data-if="c" style="display:none">ForbiddenArea</span><span data-if="cpp" style="display:none">ForbiddenArea</span><span data-if="com" style="display:none">ForbiddenArea</span><span data-if="dotnet" style="display:none">forbiddenArea</span><span data-if="python" style="display:none">forbidden_area</span></code></i></a>).  The number
of iterations is determined by the parameter <a href="#Iterations"><i><code><span data-if="hdevelop" style="display:inline">Iterations</span><span data-if="c" style="display:none">Iterations</span><span data-if="cpp" style="display:none">Iterations</span><span data-if="com" style="display:none">Iterations</span><span data-if="dotnet" style="display:none">iterations</span><span data-if="python" style="display:none">iterations</span></code></i></a>.
By passing <i><span data-if="hdevelop" style="display:inline">'maximal'</span><span data-if="c" style="display:none">"maximal"</span><span data-if="cpp" style="display:none">"maximal"</span><span data-if="com" style="display:none">"maximal"</span><span data-if="dotnet" style="display:none">"maximal"</span><span data-if="python" style="display:none">"maximal"</span></i>, <code><span data-if="hdevelop" style="display:inline">expand_gray_ref</span><span data-if="c" style="display:none">expand_gray_ref</span><span data-if="cpp" style="display:none">ExpandGrayRef</span><span data-if="com" style="display:none">ExpandGrayRef</span><span data-if="dotnet" style="display:none">ExpandGrayRef</span><span data-if="python" style="display:none">expand_gray_ref</span></code> iterates
until convergence, i.e., until no more changes occur.  By passing 0
for this parameter, all non-overlapping regions are returned.  The
two modes of operation (<i><span data-if="hdevelop" style="display:inline">'image'</span><span data-if="c" style="display:none">"image"</span><span data-if="cpp" style="display:none">"image"</span><span data-if="com" style="display:none">"image"</span><span data-if="dotnet" style="display:none">"image"</span><span data-if="python" style="display:none">"image"</span></i> and <i><span data-if="hdevelop" style="display:inline">'region'</span><span data-if="c" style="display:none">"region"</span><span data-if="cpp" style="display:none">"region"</span><span data-if="com" style="display:none">"region"</span><span data-if="dotnet" style="display:none">"region"</span><span data-if="python" style="display:none">"region"</span></i>)
are different in the following ways:
</p>
<dl class="generic">

<dt><b>'image'</b></dt>
<dd><p>

The input regions are expanded iteratively until they
touch another region or the image border, or the expansion
stops because of too high gray value differences.  Because
<code><span data-if="hdevelop" style="display:inline">expand_gray_ref</span><span data-if="c" style="display:none">expand_gray_ref</span><span data-if="cpp" style="display:none">ExpandGrayRef</span><span data-if="com" style="display:none">ExpandGrayRef</span><span data-if="dotnet" style="display:none">ExpandGrayRef</span><span data-if="python" style="display:none">expand_gray_ref</span></code> processes all regions
simultaneously, gaps between regions are distributed
evenly to all regions with a similar gray value.
Overlapping regions are split by distributing the area of
overlap evenly to both regions.
</p></dd>

<dt><b>'region'</b></dt>
<dd><p>

No expansion of the input regions is performed.  Instead,
only overlapping regions are split by distributing the
area of overlap evenly to regions having a matching gray
value or color.
</p></dd>
</dl>
<h2 id="sec_attention">注意</h2>
<p>Because regions are only expanded into areas having a matching gray
value or color, usually gaps will remain between the output regions,
i.e., the segmentation is not complete.</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="Regions" class="parname"><b><code><span data-if="hdevelop" style="display:inline">区域</span><span data-if="c" style="display:none">区域</span><span data-if="cpp" style="display:none">区域</span><span data-if="com" style="display:none">区域</span><span data-if="dotnet" style="display:none">区域</span><span data-if="python" style="display:none">区域</span></code></b> (input_object)  </span><span>region(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="c" style="display:none">Hobject</span></span>
</div>
<p class="pardesc">Regions for which the gaps are to be closed, or which
are to be separated.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Image" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Image</span><span data-if="c" style="display:none">Image</span><span data-if="cpp" style="display:none">Image</span><span data-if="com" style="display:none">Image</span><span data-if="dotnet" style="display:none">image</span><span data-if="python" style="display:none">image</span></code></b> (input_object)  </span><span>(multichannel-)image <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="c" style="display:none">Hobject</span> (byte / cyclic)</span>
</div>
<p class="pardesc">Image (possibly multi-channel) for gray value or color
comparison.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="ForbiddenArea" class="parname"><b><code><span data-if="hdevelop" style="display:inline">ForbiddenArea</span><span data-if="c" style="display:none">ForbiddenArea</span><span data-if="cpp" style="display:none">ForbiddenArea</span><span data-if="com" style="display:none">ForbiddenArea</span><span data-if="dotnet" style="display:none">forbiddenArea</span><span data-if="python" style="display:none">forbidden_area</span></code></b> (input_object)  </span><span>region <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="c" style="display:none">Hobject</span></span>
</div>
<p class="pardesc">Regions in which no expansion takes place.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="RegionExpand" class="parname"><b><code><span data-if="hdevelop" style="display:inline">RegionExpand</span><span data-if="c" style="display:none">RegionExpand</span><span data-if="cpp" style="display:none">RegionExpand</span><span data-if="com" style="display:none">RegionExpand</span><span data-if="dotnet" style="display:none">regionExpand</span><span data-if="python" style="display:none">region_expand</span></code></b> (output_object)  </span><span>region(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HRegion.html">HRegion</a></span><span data-if="c" style="display:none">Hobject *</span></span>
</div>
<p class="pardesc">Expanded or separated regions.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Iterations" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Iterations</span><span data-if="c" style="display:none">Iterations</span><span data-if="cpp" style="display:none">Iterations</span><span data-if="com" style="display:none">Iterations</span><span data-if="dotnet" style="display:none">iterations</span><span data-if="python" style="display:none">iterations</span></code></b> (input_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">Union[int, str]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string / </span><span data-if="hdevelop" style="display:inline">integer)</span><span data-if="dotnet" style="display:none"> (<i>string</i> / </span><span data-if="dotnet" style="display:none">int / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>HString</i> / </span><span data-if="cpp" style="display:none">Hlong)</span><span data-if="c" style="display:none"> (<i>char*</i> / </span><span data-if="c" style="display:none">Hlong)</span></span>
</div>
<p class="pardesc">Number of iterations.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'maximal'</span>
    <span data-if="c" style="display:none">"maximal"</span>
    <span data-if="cpp" style="display:none">"maximal"</span>
    <span data-if="com" style="display:none">"maximal"</span>
    <span data-if="dotnet" style="display:none">"maximal"</span>
    <span data-if="python" style="display:none">"maximal"</span>
</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span><span data-if="hdevelop" style="display:inline">'maximal'</span><span data-if="c" style="display:none">"maximal"</span><span data-if="cpp" style="display:none">"maximal"</span><span data-if="com" style="display:none">"maximal"</span><span data-if="dotnet" style="display:none">"maximal"</span><span data-if="python" style="display:none">"maximal"</span>, 1, 2, 3, 4, 5, 7, 10, 15, 20, 30, 50, 70, 100, 150, 200, 300, 500</p>
<p class="pardesc"><span class="parcat">Value range:
      </span><code>1
          ≤
        
    <span data-if="hdevelop" style="display:inline">Iterations</span>
    <span data-if="c" style="display:none">Iterations</span>
    <span data-if="cpp" style="display:none">Iterations</span>
    <span data-if="com" style="display:none">Iterations</span>
    <span data-if="dotnet" style="display:none">iterations</span>
    <span data-if="python" style="display:none">iterations</span>
    
          ≤
          500</code> (lin)</p>
<p class="pardesc"><span class="parcat">Minimum increment:
      </span>1</p>
<p class="pardesc"><span class="parcat">Recommended increment:
      </span>1</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Mode" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Mode</span><span data-if="c" style="display:none">Mode</span><span data-if="cpp" style="display:none">Mode</span><span data-if="com" style="display:none">Mode</span><span data-if="dotnet" style="display:none">mode</span><span data-if="python" style="display:none">mode</span></code></b> (input_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">str</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Expansion mode.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'image'</span>
    <span data-if="c" style="display:none">"image"</span>
    <span data-if="cpp" style="display:none">"image"</span>
    <span data-if="com" style="display:none">"image"</span>
    <span data-if="dotnet" style="display:none">"image"</span>
    <span data-if="python" style="display:none">"image"</span>
</p>
<p class="pardesc"><span class="parcat">List of values:
      </span><span data-if="hdevelop" style="display:inline">'image'</span><span data-if="c" style="display:none">"image"</span><span data-if="cpp" style="display:none">"image"</span><span data-if="com" style="display:none">"image"</span><span data-if="dotnet" style="display:none">"image"</span><span data-if="python" style="display:none">"image"</span>, <span data-if="hdevelop" style="display:inline">'region'</span><span data-if="c" style="display:none">"region"</span><span data-if="cpp" style="display:none">"region"</span><span data-if="com" style="display:none">"region"</span><span data-if="dotnet" style="display:none">"region"</span><span data-if="python" style="display:none">"region"</span></p>
</div>
  <div class="par">
<div class="parhead">
<span id="RefGray" class="parname"><b><code><span data-if="hdevelop" style="display:inline">RefGray</span><span data-if="c" style="display:none">RefGray</span><span data-if="cpp" style="display:none">RefGray</span><span data-if="com" style="display:none">RefGray</span><span data-if="dotnet" style="display:none">refGray</span><span data-if="python" style="display:none">ref_gray</span></code></b> (input_control)  </span><span>integer(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">MaybeSequence[int]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (integer)</span><span data-if="dotnet" style="display:none"> (<i>int</i> / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>Hlong</i>)</span><span data-if="c" style="display:none"> (<i>Hlong</i>)</span></span>
</div>
<p class="pardesc">Reference gray value or color for comparison.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>128</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span>1, 10, 20, 50, 100, 128, 200, 255</p>
<p class="pardesc"><span class="parcat">Value range:
      </span><code>1
          ≤
        
    <span data-if="hdevelop" style="display:inline">RefGray</span>
    <span data-if="c" style="display:none">RefGray</span>
    <span data-if="cpp" style="display:none">RefGray</span>
    <span data-if="com" style="display:none">RefGray</span>
    <span data-if="dotnet" style="display:none">refGray</span>
    <span data-if="python" style="display:none">ref_gray</span>
    
          ≤
          255</code> (lin)</p>
<p class="pardesc"><span class="parcat">Minimum increment:
      </span>1</p>
<p class="pardesc"><span class="parcat">Recommended increment:
      </span>10</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Threshold" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Threshold</span><span data-if="c" style="display:none">Threshold</span><span data-if="cpp" style="display:none">Threshold</span><span data-if="com" style="display:none">Threshold</span><span data-if="dotnet" style="display:none">threshold</span><span data-if="python" style="display:none">threshold</span></code></b> (input_control)  </span><span>integer(-array) <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">MaybeSequence[int]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (integer)</span><span data-if="dotnet" style="display:none"> (<i>int</i> / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>Hlong</i>)</span><span data-if="c" style="display:none"> (<i>Hlong</i>)</span></span>
</div>
<p class="pardesc">Maximum difference between the reference gray value
or color and a candidate for expansion.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>32</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span>4, 10, 15, 20, 25, 30, 40</p>
<p class="pardesc"><span class="parcat">Value range:
      </span><code>1
          ≤
        
    <span data-if="hdevelop" style="display:inline">Threshold</span>
    <span data-if="c" style="display:none">Threshold</span>
    <span data-if="cpp" style="display:none">Threshold</span>
    <span data-if="com" style="display:none">Threshold</span>
    <span data-if="dotnet" style="display:none">threshold</span>
    <span data-if="python" style="display:none">threshold</span>
    
          ≤
          255</code> (lin)</p>
<p class="pardesc"><span class="parcat">Minimum increment:
      </span>1</p>
<p class="pardesc"><span class="parcat">Recommended increment:
      </span>5</p>
</div>
<div data-if="hdevelop" style="display:inline">
<h2 id="sec_example_hdevelop">Example (C++ (HALCON 5.0-10.0))</h2>
<pre class="example">
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
using namespace Halcon;

int main (int argc, char *argv[])
{
  HImage   image (argv[1]);
  HRegion  empty_region;
  HWindow  win;

  win.SetDraw ("margin");
  win.SetColored (12);

  image.Display (win);

  HRegionArray seg = (image &gt;= 100).Connection ();
  seg.Display (win);

  Tuple iter = "maximal";
  Tuple mode = "image";
  Tuple refg = 128;
  Tuple thrs = 32;

  HRegionArray exp = seg.ExpandGrayRef (image, empty_region,
                                        iter, mode, refg, thrs);
  exp.Display (win);
  win.Click ();

  return (0);
}
</pre>
</div>
<div data-if="c" style="display:none">
<h2 id="sec_example_c">例程 (C)</h2>
<pre class="example">
read_image(&amp;Image,"fabrik");
disp_image(Image,WindowHandle);
regiongrowing(Image,&amp;RawSegments,3,3,6.0,100);
set_colored(WindowHandle,12);
disp_region(RawSegments,WindowHandle);
T_intensity(RawSegments,Image,&amp;Mean,NULL);
set_i(Thresh,24,0);
set_s(Iter,"maximal",0);
set_s(Mode,"image",0);
T_expand_gray_ref(RawSegments,Image,EMPTY_REGION,&amp;Segments,Iter,Mode,
               Mean,Thresh);
disp_region(Segments,WindowHandle);
</pre>
</div>
<div data-if="cpp" style="display:none">
<h2 id="sec_example_cpp">Example (C++ (HALCON 5.0-10.0))</h2>
<pre class="example">
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
using namespace Halcon;

int main (int argc, char *argv[])
{
  HImage   image (argv[1]);
  HRegion  empty_region;
  HWindow  win;

  win.SetDraw ("margin");
  win.SetColored (12);

  image.Display (win);

  HRegionArray seg = (image &gt;= 100).Connection ();
  seg.Display (win);

  Tuple iter = "maximal";
  Tuple mode = "image";
  Tuple refg = 128;
  Tuple thrs = 32;

  HRegionArray exp = seg.ExpandGrayRef (image, empty_region,
                                        iter, mode, refg, thrs);
  exp.Display (win);
  win.Click ();

  return (0);
}
</pre>
</div>
<div data-if="com" style="display:none">
<h2 id="sec_example_com">Example (C++ (HALCON 5.0-10.0))</h2>
<pre class="example">
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
using namespace Halcon;

int main (int argc, char *argv[])
{
  HImage   image (argv[1]);
  HRegion  empty_region;
  HWindow  win;

  win.SetDraw ("margin");
  win.SetColored (12);

  image.Display (win);

  HRegionArray seg = (image &gt;= 100).Connection ();
  seg.Display (win);

  Tuple iter = "maximal";
  Tuple mode = "image";
  Tuple refg = 128;
  Tuple thrs = 32;

  HRegionArray exp = seg.ExpandGrayRef (image, empty_region,
                                        iter, mode, refg, thrs);
  exp.Display (win);
  win.Click ();

  return (0);
}
</pre>
</div>
<div data-if="dotnet" style="display:none">
<h2 id="sec_example_dotnet">Example (C++ (HALCON 5.0-10.0))</h2>
<pre class="example">
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
using namespace Halcon;

int main (int argc, char *argv[])
{
  HImage   image (argv[1]);
  HRegion  empty_region;
  HWindow  win;

  win.SetDraw ("margin");
  win.SetColored (12);

  image.Display (win);

  HRegionArray seg = (image &gt;= 100).Connection ();
  seg.Display (win);

  Tuple iter = "maximal";
  Tuple mode = "image";
  Tuple refg = 128;
  Tuple thrs = 32;

  HRegionArray exp = seg.ExpandGrayRef (image, empty_region,
                                        iter, mode, refg, thrs);
  exp.Display (win);
  win.Click ();

  return (0);
}
</pre>
</div>
<h2 id="sec_result">结果</h2>
<p><code><span data-if="hdevelop" style="display:inline">expand_gray_ref</span><span data-if="c" style="display:none">expand_gray_ref</span><span data-if="cpp" style="display:none">ExpandGrayRef</span><span data-if="com" style="display:none">ExpandGrayRef</span><span data-if="dotnet" style="display:none">ExpandGrayRef</span><span data-if="python" style="display:none">expand_gray_ref</span></code> always 返回值 <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
    .  The
behavior in case of empty input (no regions given) can be set via
<a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system('no_object_result',&lt;Result&gt;)</span><span data-if="c" style="display:none">set_system("no_object_result",&lt;Result&gt;)</span><span data-if="cpp" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="com" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="dotnet" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="python" style="display:none">set_system("no_object_result",&lt;Result&gt;)</span></code></a>,
the behavior in case of an empty input region via
<a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system('empty_region_result',&lt;Result&gt;)</span><span data-if="c" style="display:none">set_system("empty_region_result",&lt;Result&gt;)</span><span data-if="cpp" style="display:none">SetSystem("empty_region_result",&lt;Result&gt;)</span><span data-if="com" style="display:none">SetSystem("empty_region_result",&lt;Result&gt;)</span><span data-if="dotnet" style="display:none">SetSystem("empty_region_result",&lt;Result&gt;)</span><span data-if="python" style="display:none">set_system("empty_region_result",&lt;Result&gt;)</span></code></a>,
and the behavior in case of an empty result region via
<a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system('store_empty_region',&lt;'true'/'false'&gt;)</span><span data-if="c" style="display:none">set_system("store_empty_region",&lt;"true"/"false"&gt;)</span><span data-if="cpp" style="display:none">SetSystem("store_empty_region",&lt;"true"/"false"&gt;)</span><span data-if="com" style="display:none">SetSystem("store_empty_region",&lt;"true"/"false"&gt;)</span><span data-if="dotnet" style="display:none">SetSystem("store_empty_region",&lt;"true"/"false"&gt;)</span><span data-if="python" style="display:none">set_system("store_empty_region",&lt;"true"/"false"&gt;)</span></code></a>.
如有必要，将引发异常。</p>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="connection.html"><span data-if="hdevelop" style="display:inline">connection</span><span data-if="c" style="display:none">connection</span><span data-if="cpp" style="display:none">Connection</span><span data-if="com" style="display:none">Connection</span><span data-if="dotnet" style="display:none">Connection</span><span data-if="python" style="display:none">connection</span></a></code>, 
<code><a href="regiongrowing.html"><span data-if="hdevelop" style="display:inline">regiongrowing</span><span data-if="c" style="display:none">regiongrowing</span><span data-if="cpp" style="display:none">Regiongrowing</span><span data-if="com" style="display:none">Regiongrowing</span><span data-if="dotnet" style="display:none">Regiongrowing</span><span data-if="python" style="display:none">regiongrowing</span></a></code>, 
<code><a href="pouring.html"><span data-if="hdevelop" style="display:inline">pouring</span><span data-if="c" style="display:none">pouring</span><span data-if="cpp" style="display:none">Pouring</span><span data-if="com" style="display:none">Pouring</span><span data-if="dotnet" style="display:none">Pouring</span><span data-if="python" style="display:none">pouring</span></a></code>, 
<code><a href="class_ndim_norm.html"><span data-if="hdevelop" style="display:inline">class_ndim_norm</span><span data-if="c" style="display:none">class_ndim_norm</span><span data-if="cpp" style="display:none">ClassNdimNorm</span><span data-if="com" style="display:none">ClassNdimNorm</span><span data-if="dotnet" style="display:none">ClassNdimNorm</span><span data-if="python" style="display:none">class_ndim_norm</span></a></code>
</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="select_shape.html"><span data-if="hdevelop" style="display:inline">select_shape</span><span data-if="c" style="display:none">select_shape</span><span data-if="cpp" style="display:none">SelectShape</span><span data-if="com" style="display:none">SelectShape</span><span data-if="dotnet" style="display:none">SelectShape</span><span data-if="python" style="display:none">select_shape</span></a></code>
</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="expand_gray.html"><span data-if="hdevelop" style="display:inline">expand_gray</span><span data-if="c" style="display:none">expand_gray</span><span data-if="cpp" style="display:none">ExpandGray</span><span data-if="com" style="display:none">ExpandGray</span><span data-if="dotnet" style="display:none">ExpandGray</span><span data-if="python" style="display:none">expand_gray</span></a></code>, 
<code><a href="expand_region.html"><span data-if="hdevelop" style="display:inline">expand_region</span><span data-if="c" style="display:none">expand_region</span><span data-if="cpp" style="display:none">ExpandRegion</span><span data-if="com" style="display:none">ExpandRegion</span><span data-if="dotnet" style="display:none">ExpandRegion</span><span data-if="python" style="display:none">expand_region</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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